*{
    margin: 0;
    padding: 0;
}
.header{
    position: fixed;
    top: 0px;
    width: 100%;
    height: 88px;
    background-color: #5fc0cd;
    display: flex;
    justify-content: center;
    align-items: center;
}
.header1 {
    width: 140px;
    height: 70px;
    font-family: "SimHei";
    font-size: 32px;
    color:  white;
    outline: none;
    cursor: pointer;
    background-color: #55a8b3;
    border: none;
    border-radius: 10px;
}
.header2 {
    width: 140px;
    height: 70px;
    font-family: "SimHei";
    font-size: 32px;
    color:  #5fc0cd;
    outline: none;
    cursor: pointer;
    background-color: white;
    border: none;
    border-radius: 10px;
}
.header3 {
    position: fixed;
    top: 22px;
    right: 2vw;
    background-color: transparent;
    border-style: none;
    outline: none;
    cursor: pointer;
}
.footer {
    position: fixed;
    bottom: 0px;
    width: 100%;
    height: 100px;
    background-color: #f8fafb;
    border-top: 1px solid #e2eaec;
    display: flex;
    justify-content: center;
    align-items: center;
}
.footer1 {
    font-size: 16px;
    color: #5fc0cd;
    background-color: transparent;
    border-style: none;
    outline: none;
    cursor: pointer;
    margin-right: 10%;
}
.footer span {
    display: inline-block;
    width: 46px;
    height: 40px;
    border: none;
    background-image: url(sprites.png);
}
.a1 {
    background-position: 0 -110px; 
}
.footer2 {
    font-size: 16px;
    color: #999999;
    background-color: transparent;
    border-style: none;
    outline: none;
    cursor: pointer;
    margin-left: 10%;
}
.a2 {
    background-position: -48px -110px;
}
.footer3 {
    background-color: transparent;
    border-style: none;
    outline: none;
    cursor: pointer;
}
#nav {
    position: fixed;
    top: 88px;
    width: 100%;
    height: 80px;
    font-size: 28px;
    color: #999999;
    border-bottom: 1px solid #e2eaec;
    display: flex;
    list-style: none;  
}
#nav li {
    margin: 21.5px auto;
}
#nav :hover li {
    display: block;
}
#nav li ul li {
    display: none;
}
.main span {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: none;
    background-image: url(sprites.png);
    vertical-align: middle;
}
.a3 {
    background-position: 0 0;
}
.a4 {
    background-position: -25px 0;
}
.main {
    position: fixed;
    top: 168px;
    bottom: 100px;
    width: 100%;
    overflow: auto;
    color: #999999;

}
.box1 {
    height: 50px;
    float: left;
    clear: both;
    line-height: 50px;

}
.box2 {
    height: 50px;
    color: black;
    float: left;
    clear: both;
    line-height: 50px;

}
.box3 {
    height: 50px;
    float: left;
    clear: both;
    line-height: 50px;
 
}
.price {
    float: right;
    color: red;
    font-size: 24px;
    line-height: 50px;
   
}
#main {
  
    height: 150px;
    border-bottom: 1px #e2eaec solid;
    padding: 0 20px 0 20px;

}
